Rotary blower.



B. LARSEN & W. H. PARKIN.

ROTARY BLOWER.

APPLIoATloN FILED Nov.15, 191s.

1,111,160. Patented .22,1911

B. LARSEN 6L W. H. PARKIN.

ROTARY BLOWER.

A PPLIUATION FILED Nov. 15, 1913.

1, 1 1 1,160. Patented Sept. 22, 19m

5 SHEBTS-SHBET 2.

B. LARSEN'& W. H. PARKIN. ROTARY BLOWER.

APPLICATION IILBD 11017.15, 1913. 1,1 1 1,1 60. Patented Sept. 22, 1914,

5 SHEETS-SHEET 3.

amante/5 www B.. LARSEN & W. H. PARKIN.

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1,1 1 1,160. l Patented Sept. 22, 1914,

5 SSSSSSS SHEET 4.

B. LARSEN & W. H. PARKIN. ROTARY BLOWER. APPLICATION FILED NO V. 15, 1913. y

1,1 1 1, 1 60. Pabentea sept. 22, 1914A 5 SHEETS-SHEET 5.

BERTINIUS LARSEN AND WALTER H. PARKIN, NATIONAL-STANDARD COMPANY,

OFNILES, MICHIGAN, ASSIGNORS T GF NILES, MICHIGAN.

ROTARY BLOWER.

Specication of Letters Patent.

' Patented sept. 2e, rara.

Application led November 15, 1913. Serial No. 801,289.

To all whom it may concern:

- nal packing.

' tion by Be it known that we, BERTINIUS LARsEN 1ndA WALTER H. PARKIN, citizens of the United States, residing at Niles, Michigan, have invented certain new and useful Improvements in Rotary Blowers, of which the following is a specification.

This invention relates to improvements in rotary blowers. i

- The main objects of this invention are: First, to provide in a rotary blower an improved piston or drum structure. Second, to provide in a rotary blower, an improved piston blade or movable abutment. Third, to provide in a rotary blower, improved piston blade or movable abutment shoes and connections therefor to the piston blades. Fourth, to provide an improved rotary blower which may beladjusted to take up wear and to 4adapt the blower for high and low pressures. Fifth, to provide in a rotary blower an improved bearing and jour- SiXth, to provide an improved rotary blower in which the parts are simple and economical to produce and easily assembled, and one which is very durable in use.

.Further objects, and objects relating to structural details, will definitely appear from lthe detailed description -to follow.

We accomplish the objects of our inventhe devices and means described in the following specification.

The invention is clearly defined and pointed out in the claims. l

A structure which'is a preferred embodiment of our invention is clearly illustrated inthe accompanying drawing forming a part of this speciication, in which:

Figure I is a perspective view of astructure embodying the features of our inveny tion.

Fig. II is an end elevation looking from the right of Fig. I. FigfIII is a vertical transverse section on a. line corresponding to line 3 3 of Fig. IV, the piston blades or movable abutments and certain parts attached thereto being in full lilies.l Fig. IV

1s'a.n.elevation View mainlyin longitudinal ,',i'fertical-section, on a line corresponding to line L -4. of'Fig. III, Fig. V is a transverse section on aline corresponding to line 5--5 of F ig, IV. Fig. VI is an enlarged detail section on aline corresponding to line 6-6 of Figs. IV and V, Showing structural details of the piston and piston blades or movablelabutments. Fig. VII is a detail transverse section ona line corresponding to line 7 7 of Fig. IV, showing details of the piston blade or movable abutment bearings in piston-or drum. Fig. VIII is a detail transverse section on a line corresponding to line 8-8 of Fig. IV, showing further details of the piston blade bearing in the piston. Fig. IX is a side elevation of one form of the piston blade or movable abutment. Fig. X is a side elevation of the other form of piston blade or movable abutment. Fig. XIy is an enlarged detail vertical section on a line corresponding to line l1-l1 of Fig. IV, showin'g details ofthe adjusting means. Fig. XII is a perspective view of the piston body or drum. Fig. XIII is a detail perspective view of one of the piston head'or drum head members by which the journals are connected thereto. Fig. XIV is an inside perspective view of the other piston head or drum head member. Fig.` XV is a perspective view vof the piston body or drum showing it as it is cast. Fig. XVI is a central longitudinal section through the piston or drum with the piston blades or movable abutments removed. l

In the drawing, similar reference characters refer to similar parts throughout theV several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawing, the cylinder or cylindrical casing l is provided with an inlet 2 at one side, and a discharge 3 near the top at the opposite side. The cylinder is provided with removable heads 4 attached 'by the bolts 5 engaging the outwardly projecting flanges 6 at the ends `of the cylinder. In practice, suitable packing rings, not shown in the accompanying drawing, are provided for these heads. The cylinder is mounted upon a suitable base or pedestal 7 The piston body or drum 8 is cast iron casting,` preferably cored or chambered, as

shown, with internal longitudinal radially disposed web portions 9 therein. The radial The piston body or drum is cast in a sini gle piece with a hub-like projection 15 at one end and is cast upon a cross 16 at the other end. This facilitates the casting of the piston drum or body and also the lathe Work upon the same.

The piston end members or head members 17 are secured to the ends of the pistons by' the bolts 31. These members 17 are of the sameshape for convenience in manufacturlng. the piston journals 30 being integral therewith. f c

The members 17 are provided `with central hub-like projections 29, that of the left hand member being recessed to receive the hub-like projection 15 on the piston body or drum. The end members 17 are provided with radial slot-like recesses 171 registering with the slotsof thc piston body or drum, the recesses 171 being adapted to receive the journal blocks 18 for the piston blade shoes 19. The cylinder heads 4 are provided with annular groove-like bearings 2O for these shoes 19, the blocks 18 having bearing pins 21 engaging the shoes. The blocks are provided with bearing shoulders for th'e shoes at the bases of the journals. The ends of the blades are ynotched at 22,1while the blocks 18 are slotted at 23 to receive the ends of the blades, and are rigidly secured thereto by the rivets 24. As the piston is rev volved, the shoes traveling around in the bearing grooves 20, keep the blades in proper position, just out of contact with the walls of the cylinder. The shoes 19 are inclined at 25 on their inner faces so that they readily pass the piston as the blades are moved in and out of the piston by the rotation thereof, which is eccentrically disposed within the cylinder. The shoes are longitudinally curved to correspond to the curvature of the bearing groove 20. See Figs. V and VI. The shoes when thus formed and mounted on the blades are practically noiseless. The blades are arranged in oppositely disposed pairs, one pair having Ycentral extensions 26 on their inner edges and the other pair, extensions 27 at each end spaced so as to receive the extensions 26 between them. These extensions on the blades assistin supporting them when they areffully extended and at the same time, the blades `do not interfere with one another as .they are retracted,y as the extensions interlap They are preferably formed of steel,

when the ,blades are intheir retracted positions within the piston. The blocks 18 not only serve as an effective attaching means for the shoes to the blades 11, but serve also as reinforcingand guiding members for the blades.

The cylinder heads 4 are provided with internal recesses 28, for the projections 29 of the members 17. The bearing members 32 are provided with attaching flanges 33 at their innerends, which are secured to thev cylinder heads by means of the screw bolts The openings 35 in the cylinder heads are somewhat larger than the diameter of the journals 30 soas to permit theA lateral adjustment of the journals therein. This lateral adjustment is effected by making the holes 36 for the bolts` 34 large enough to 38.' The bearing members are clamped A upon the wedges by means of the screws 41 arranged through the projecting ears 42 at the top of the cylinder heads and threaded into the flanges 33. See Figs. I and IV. By thus arranging the parts,l the bearings may be adjusted to take up wear, and also, and this is also a very important function, to adjust the piston or drum relative to the cylinder. When operating the'blower on high pressures, it is necessary that the clearance between the drum and vcylinder wall shall be very` slight. This, however, is not necessary when only low .pressures aredesired, andu it is found that a great saving' power is obtained by reducing the air compression at this point, which may, as will be,r readily understood, be accomplished thrdugh the adjustment described. The bearing members 32 are provided with lubricant chambers 43.V

The structure illustrated is of the ring lubricator type, the bushings 44 being provided with grooves 45 for the oil rings 46, which depend into the lubricant chamber in the well-known. way. The bear-ing bushings are provided with oil discharge openings 53 and 54 in their bottoms, the openings being located at the outer sides of the oil rings. The bushings also have cavities 55 communicating with the discharge openings 54 which cavities serve to collect the.

lubricant at the outer ends 0f the journals and through the openings 54 redeliver it to the reservoir. The oil ringsare introduced glands, being i 49 are arrangedin suitable seats 50 provided therefor, in the bearing member. By adjusting the glands upon the packing meinbers, they are compressed to form a tight joint at this point. The bearing bushings are readily removable so that they can be renewed as desired. ton is provided with a driving wheel 5l, the outer end of the journal being supported by the pedestal 52.

By forming the drum or we have illustrated and described, we secure a structure in which the body can be readily formed of cast iron which is a satisfactory material for this purpose, and also, may be formed in one piece. The heads or drum ends,when attached, not only serve to secure piston body as v the journals to the piston body' or drum, but

'be deemed also serve as reinforcing and supporting members. By providing the Babbitt bearing surfaces, perfect bearings for the blades can be secured of a material highly satisfactory for bearing surfaces without expensive machine work, and should the bearings become worn, they can 'be readily knocked out and new bearings provided` By adjusting the bearing members vertically, the drum is brought into contact with the cylinder wall as desired.

In operating on high pressures, it is quite necessary thatclose contact be had between the walls of the cylinder and the drum, but in operating on low pressures, less closeness is required, thus not only reducing wear on the blower, but also, requiringvery much less power to operate. The contact may be regulated by adjustment of the journals. The adjustment may be used to compensate for Wear on the journals and their bearings. The journal bushings serve, as stated, the purpose of packing glands for the journals, and at the same time, they can be readily renewed as occasion requires. Our improved blower is very eflicient, requires little power to operate, and is simplie and economical to produce.

We have not attempted tov illustrate various modilications we contemplate as we believe the disclosure made will enable those skilled in the art to which this invention relates to adapt or embody the same as may desirable. We desire, however, to be understood as claiming our improvements specifically in the form illustrated as One journal of the pis` pended claims.

Having thus described our invention what we claim as new and desire to secure by Letters Patent is: l

well as broadly within the scope of the ap- 1. In a structure of the class described,

tliecombination of a cylinder, heads therefor having annular groove-like shoe ways in their inner sides; a cast iron piston body having piston blade slots therein extending from end to end of the body, integrally with a hub-like projection at one end, the end of said hub-like projection being unslotted; steel end members secured to the ends of-said body and having journals` integral therewith and ing with the blade slots of said body and hub-like projections, the projection of one -end member being recessed to receive said hub-like projection on said body, said cylindervheads being recessed to receive said hublike projection on said end members; piston blades disposed in said slots in said piston body; shoe journal blocks slotted to receive said piston blades and rigidly secured thereto, said blocks being in said end members and provided with journals projectinginto said shoe ways; and slices arranged on said journals to travel in said ways as the piston revolves.

2. In a structure of the class described, the

coi'nbination of a cylinder, heads therefor having annular groove-like shoe ways in their inner sides; a .cast iron piston body having piston blade slots therein extending from end to endJ of the ing cast integrall with a hubelike projection at one end, the end of said hub-like projection being unslotted; steel end members secured to the ends of said Ibody and aving journals radial slots registering with the blade slots of said body, one end member being recessed to receive said hub-like projection on said body; piston blades disposed in saidl slots in said slotted to receive said piston blades and rigidly secured thereto, said blocks being disposed in said slots in said end members and/provided with journals projecting into said shoe journalsl to travel in-sa'id ways as the piston revolves.

3. In a structure of the class described, the combination of a cylinder, heads therefor having annular groove-like shoe ways 120 -in their inner sides; a cast iron piston lbody having piston blade slots therein extending from end to end of the body, said body being cast integrally with a hub-like projection at lone end, the end of said tion being unslotted; steel end members secured to the ends of said body and having journals-integral therewith and radial slots said body being cast 75 radial slots register- 80 disposed in said slots 9o body, said body bej integral therewith and piston body; shoe journal blocks ways; and shoes arranged on said 115 hub-like projecregistering with the blade slots of said body and hub-like projections, the projection of one end member being recessed to receive said hub-likeprojection on said body, said cylinder heads being recessed to receive said hub-like projection on said end members; piston blades disposedy in said slots in said pisto-n body; and shoes connected to said bladesto travel in said ways as the piston revolves.

4. In a structure of the class described, the combination of a cylinder, heads therefor havin annular groove-like shoe ways in their inner sides; a cast iron piston body having piston blade slots therein extending from end to end of the body, said body being cast integrally with a hub-like projection at one end, the end of said hub-like projection being unslotted; steel end members secured to the ends of said body land havingjournals integral therewith, one end member being recessed to receive said hublike projection onsaid body; piston blades disposed in said slots in said piston body; and shoes connected to said blades to travel in said ways as the piston revolves.

f5. In a structure of the class described, the combination of a cylinder, heads therefor having annular groove-like shoe Ways in their inner'sides; a piston body having piston fv blade slots therein eXtendin from end to end; end members secured to t e ends of said body and having journals thereon and radial slots registering with the blade slots of said body; piston blades disposed in said slots in said piston body; shoe journal .blocks slotted to receive said piston blades and rigidly secured thereto, said blocks being disposed in said slots in said end members and provided with journals projecting into said shoe Ways; and shoes arranged on said journals to travel in said ways as the piston revolves. Y

6. In a' structure of the class described, the combination of a cylinder, heads therefor having annular groove-like shoe ways in their inner sides; a piston body having piston blade slots therein extending from end to end; end members secured to the ends of said body and having journals .thereon and radial slots registering with the blade slots of said body; piston'blades disposed in said slots in said piston body; shoe journal blocks secured to said piston blades and disposed in said slot in said end members and provided with journals projecting into said shoe ways; and shoes arranged on said journals to travel in said ways as the piston revolves. 7 A rotary blower comprising a cast iron piston body' having internal longitudinal radially disposed webs with radial piston blade slots therein extending from end to end of/the-body, said body being castl integraily with a hub-like projection at one end,

body, one end the end of said hub-like projection being unslotted; steel end members secured said body and having piston journals integral therewith and radial slots registering with the blade slots of said body, one end member being recessed to receive said hublike projection on said body; piston blades disposed in said slots in said piston body;

and shoe journal blocks secured to said blades and disposed in said slots in said end members. l

8. A rotary blower comprising a cast iron piston body having radial piston blade slots therein extending from end to end, said body heilig cast integrally with a hub-like projection at one end, the end of said hublike projection being unslotted; steel end members secured to said body and having piston journals integral therewith and radial slots registering with the blade slots of said member being recessed to receive said hub-like projection on said body; piston blades disposed in said slots in said piston body; and shoe journal blocks secured to said blades and disposed in said slots in said en'd members.

9. A rotary blower comprising a cast iron piston body having internal longitudinal radially disposed webs with radial piston blade slots therein extending from end to end of the body, said body being cast integrally with a hub-like proj ection at one end, the end of said hub-like projection being unslotted; and steel end said body and having piston journals integral therewith, one end member being remembers secured to cessed to receive said hub-like projection onl said body.

10. A rotary blower comprising a cast iron piston body having radial piston blade slots therein extending from end to end, said body being cast integrally with a hub-like projection at one end, the end of said hublike projection being unslotted; and steel end members secured to said body and having piston journals integral therewith, one

end member being recessed to receive said v hub-like projection on said body.

11. In a structure of the class described, the combination of a cylinder; heads therefor having annular groove-like shoe ways in their inner sides; a piston provided with radial piston blade slots; piston blades disposed in said slots; shoe journal blocks slot-- ted to receive said piston blades andl rigidly secured thereto, said blocks beingl provided with journals projecting into the shoe ways and with shoulders at thebases of the journals; and shoes arranged on said journals to travel in said ways as the piston said shoes being in bearing engagement said shoulders on said blocks, acesbeing inclined outwardly therefrom.,

' V 12. In a structure of the class described,

revolves,

with, their inner tical adjustment of said journal clined Wedge seats;

the combination of a cylinder, heads therefor having annular groove-like shoe Ways in their-inner sides; a piston provided with radial piston blade slots; piston blades disposed in said slots; shoe journals secured to said blades to project into said Ways; and shoes arranged on said journals to travel in said Ways as the piston revolves, the inner faces of said'shoes being inclined outwardly.

13. In a structure of the class described, the combination with the cylinder, heads therefor; a piston provided With radially movable piston blades disposed eccentrically Within the cylinder; journals therefor projecting through the cylinder heads; journal bearing members bolted to said heads, the bolt openings being enlarged to permit vertical adjustment of, said bearing members; inclined Wedge seats on said cylinder heads below said journals; adjusting Wedges arranged on said seats and engaging said bearing members, said Wedges being inclined on their under sides to coact with said inscreWs for adjusting said Wedges on their said seats; and screvvs carried by the cylinder heads engaging said bearing members opposite said adjusting Wedges.

14. In a structure of the class described, the combination With the cylinder, heads therefor; a piston provided With radially movable piston blades disposed eccentrically Within the cylinder; journals therefor proj ecting through the cylinder heads; journal bearing members bolted to said heads, the bolt openings being enlarged to permit vertical adjustment of said bearing members; Wedge seats on said cylinder heads; adjusting Wedges arranged on said seats and engaging said bearing members, said Wedges being inclined to coact With said inclined Wedge seats; and screws for adjusting said Wedges on their said seats.

15. In a structure of the class described, the combination with the cylinder, heads therefor; a piston provided with radially movable piston blades disposed eccentrically Within the cylinder; journals therefor projecting through the cylinder heads; journal bearing members bolted to said heads, the holt openings being. enlarged to permit vermembers; Wedge seats on said cylinder heads; and adjusting Wedges arranged on said seats and engaging said bearing members.

16. In a structure of the class described, the combinatiaon of a cylinder, heads therefor, a piston provided with radiallymovable piston blades disposed eccentrically Within the cylinder, journals therefor projecting through the cylinder heads, the cylder heads having openings for said journals of such size to permit the lateral adjustment of the journals therein, and journal bearing members mounted on the outer sides of said heads for lateral adjustment whereby the piston may be adjusted Within the cylinder. 17. In a structure of the class described, the combination with the cylinder provided With a suitable head, a rotary piston, a journal therefor projecting through -said head, a journal bea-ring member on said head adapted to receive a bearing bushing and having an oil reservoir therein and transverse openings at the top adapted to receive oil rings, a bushing arranged in said bearing member for longitudinal adjustment therein, said bushing being slotted to receive oil rings and having oil discharge openings in its bottom located at the outer sides of the oil rings, there being an internal cavity near, the outer end of said ushing communicating With one of said oil discharge openings thereof, oil rings arranged in said slots in said bushing, a packing ring arranged at the inner end of said bushing, said bearing member being provided with a packing ring seat at the inner end of said bushing, and means for adjusting said bushing longitudinally whereby it constitutes a packing gland, said oil rings being adjustable laterally' With said bushing. In a structure of the class described,

the combination with the cylinder provided with a. suitable head, a rotary piston, a

journal therefor projecting through said head, a journal bearingmember on said head adapted to receive a bearing bushing and having an oil reservoir therein and transverse openings at the top adapted to receive oil rings, a bushing arranged in said bearing member for longitudinal adjustment therein, said bushing being slotted to receive oil rings and having an oil discharge opening in its bottom and an internal oil collecting cavity near its outer end communicating with said opening, oil rings arranged in said slots in said bushing, a packing ring arranged at the inner end of said ushing, and means for adjusting said bushing longitudinally whereby it constitutes a packing gland, said oil rings being adjustable laterally With said bushing.

19. In a structure of the class described, the combination with the cylinder provided With a suitable'r head, a rotary piston, a journal therefor projecting through said head, a journal bearing member onV said head adapted to receive a bearing bushing and having an oil reservoir therein and transverse openings atv the top adapted to receive oil rings, a bushing arranged in Said bearing member for longitudinal adjustment therein, said bushing being slotted to receive oil rings, oil rings arranged in said slots lin said bushing, a packing ring our hands and seals in the presence of vtW-o arranged at the inner end of said bushing, Witnesses.

' BERTINIUS LARSEN. [1.. 8.]

l and mea-ns for adjusting said bushing longltudnally whereby it constitutes a packing WALTER H. PARKIN. [L.s.]

5 land, said oil rings being adjustable later- Witnesses:

ally with said bushing. ANNA G. MILLER,

W. A. (JrARWooD.l

In Witness whereof, /We have hereunto set 

